(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Biodiversity Heritage Library | Children's Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "Paper Crafts"

Origami Flying Disk 



.1 



Make Projects 



build, hack, tweak, share, discover. 



Origami Flying Disk 

Written By: Cy Tymony 



f 

/ TOOLS: 


PARTS: 


Scissors (1) 


Paper (1 piece) 




Taped) 



Step 1 — Demonstrate Bernoulli's principle. 




• Cut a paper strip 1 / 2 "x4". Hold the 
paper strip just below your lips, and 
blow above the strip. The paper will 
rise! 

• This occurs because of 



Bernoulli's principle — fast- 
moving air has lower pressure than 
non-moving air. The still air below 
the strip has higher pressure than 
the moving air above, so it pushes 
the strip upward. 



© Make Projects 



www.makeprojects.com 



Page 1 of 4 



Origami Flying Disk 



Step 2 — Try another quick test. 




• Cut 2 paper strips 1 /2 M x4". Hold them about 2" apart and blow air between them. You expect 
them to blow apart, but they actually come together. Bernoulli's principle is working here 
because the faster-moving air between the strips has lower pressure than the air outside 
them, which therefore pushes them together. 

• The top of an airplane wing curves upward and has a longer surface than the 
bottom. When the plane moves, the air moving along the top must travel farther and 
faster than the air moving past the straight bottom. The faster-moving top air has less 
pressure than the bottom air. This provides lift. 



© Make Projects 



www.makeprojects.com 



Page 2 of 4 



Origami Flying Disk 



Step 3 — Make an origami flying disc. 




• Now use your newfound Bernoulli 
principle knowledge to make a 
flying disc using only paper and 
tape. 

• Cut eight 2"x2" square pieces of 
paper. Fold the top right corner of 
one square down to the lower left 
corner. Then fold the top left corner 
down to the lower left corner to 
create a small triangular pocket. 
Repeat these two folds with the 
remaining 7 squares. 

• Insert one paper figure into the left 
pocket of another. Insert the 
figures into each other until they 
form an 8-sided disc. Hold the disc 
firmly together while you apply tape 
as required. 



© Make Projects 



www.makeprojects.com 



Page 3 of 4 



Origami Flying Disk 



Step 4 




• Fly it. 

• Turn the disc over and toss it like a 
Frisbee. You'll see that it glides a 
bit, but then drops rapidly. The 
reason is that the top and bottom 
surfaces are straight. 

• Now bend down the outer edges to 
form a curved lip as shown in the 
image on the lower right. This 
should produce the Bernoulli effect. 

• Throw the flyer with a quick snap of 
your wrist, and it should stay aloft 
for a much greater distance. 



This project first appeared in MAKE Volume 10 . page 167. 



This document was last generated on 2012-10-31 11 :04:35 PM. 



© Make Projects 



www.makeprojects.com 



Page 4 of 4